BEST ANSWER:We don't give specific temperature ranges just because everyone experiences cold differently. These mitts have 300g Heatlock insulation though and paired with the leather shell they are more than capable on harsher mountain days.

BEST ANSWER:We don't give specific temperature ranges just because everyone experiences cold differently. These mitts have 300g Heatlock insulation though and paired with the leather shell they are more than capable on harsher mountain days.